消费者为表明自己的清白，有义务让经营者搜查自己的身体。（）
参考答案：错
--- Did you and your friends ride to the mountain last Sunday?
--- Yes. ________ we had !
A．How good time
B．What a good time
C．What good time
D．How fun
什么是金属材料的力学性能和工艺性能？
